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Numerical simulation method for Brownian particles dispersed in incompressible fluids
- Source :
- Chemical Physics Letters, 737, 136809 (2019)
- Publication Year :
- 2019
-
Abstract
- We present a numerical scheme for simulating the dynamics of Brownian particles suspended in a fluid. The motion of the particles is tracked by the Langevin equation, whereas the host fluid flow is analyzed by using the lattice Boltzmann method. The friction force between a particle and the fluid is evaluated correctly based on the velocity difference at the position of the particle. The coupling method accurately reproduces the long-time tail observed in the velocity auto-correlation function. We also show that the fluctuation-dissipation relation holds between the relaxation of a single particle and the velocity autocorrelation function of fluctuating particles.<br />Comment: 5 pages, 3 figures
Details
- Database :
- arXiv
- Journal :
- Chemical Physics Letters, 737, 136809 (2019)
- Publication Type :
- Report
- Accession number :
- edsarx.1909.13412
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1016/j.cplett.2019.136809